| 摘要 |
PURPOSE:To realize stable and good responsive feedback control by setting an optimum gain corresponding to hydraulic responsiveness when changing the actuating hydraulic pressure of an automatic transmission. CONSTITUTION:During transmission a signal is sent to the duty solenoid valve of a hydraulic control circuit and hydraulic pressure is feedback controlled in such a manner that the number Nr of revolution of a turbine becomes an aimed number Nro. In that case, hydraulic pressure P(o) before change is read, and during the control of increasing(raising) hydraulic pressure the larger the hydraulic pressure P(o) the larger a gain GU is set, whereas during the control of reducing(lowering) hydraulic pressure the larger the hydraulic pressure P(o) the smaller a gain GD is set. |
